@Cora, you are not rambling at all. When you get the diagnosis and treatment plan it is all so overwhelming. It is very hard at the start of your breast cancer journey. I think we all probably stressed a great deal at the beginning.
Having a new relationship with all this makes it a challenge but if your partner is good for you they will support you and be there all the way. If they aren't supportive then they aren't right for you.
Finding out your treatment is a big deal and it takes time to process of all. Many of us get counselling and maybe that's something for you to consider. I saw a psychologist who had also had breast cancer and it was really helpful for dealing with all the emotions. It is hard for love ones too so maybe they may want to get help as well.
Right now you must put yourself first no matter what. Everyone else's needs must come second even your partners.
It feels better know the cancer is cut out once surgery is done. But it is still alot to process for sure hence suggesting seeking counselling.
In terms of the hormone blockers you may or may not get side effects. Some people do and some don't. I was ok for a year and a half on tamoxifen and then all of a suggesting I had some really bad side effects. I spoke to my oncologist about it and they gave me a 6 wk break from them. Wow that felt good. Now I am on Letrozole and have been taking it for over a month now and so far so good except a little weight gain.
I guess what I am saying about hormone blockers is you may not get any side effects but if you do talk to your dr. Maybe they can change it. There are always things that can be done so you don't suffer too much.
Feel free to ask questions and stay in touch with this online support. It really helped me get through everything.